Abstract:In order to study the problem of excessive earthquake intensity in the blasting operation of shallow hole underground in the Guanfang section of Jinsha mining, the blasting vibration monitoring method was adopted to monitor two blasting operations with different explosive quantities on the surface. Based on HHT method and EMD decomposition, the peak vibration velocity, frequency and amplitude of shallow hole blasting seismic signal were analyzed. The results showed that the peak vibration velocity reflected the blasting vibration intensity and the maximum load area, and the main vibration frequency reflected the dynamic response of the construction under blasting operation. The dominant energy frequency band of blasting vibration signals of underground shallow holes were all in the range of 10~50 Hz, and the main vibration frequency of blasting was generally different under different charges. The vibration frequency tended to concentrate towards low frequency and increase in instantaneous input energy with the increase of charges.